Device



June 22 1926. 1,590,095 A. J. HOFFMAN y GROMMET SETTING nEvIcE FiledNov. 17, 1925 2 I maf; I

,i2 Alaya l auoz ne w faces thereof are curved upon themselves asindicated at 8, these curved surfaces being disposed inwardly upon theirrespective dogs with regard to the bed block 4.

A substantially oval shaped opening 9 is formed between andapproximately concentrically of the bed block 4 and serves to permit ofthe punehingof an openingV in the material receiving the fastener orgrommet, in a manner hereinafter more fully described, during` that timewhen the several portions of said grommet or fastener are.

being assembled and interconnected.

A cover plate 1() is provided the circular bed block 4 and, will benoted, is formed with a peripheral flange 11, of such size and shapeV asto snugly engage over the upper portion of such circular bed block 4 inthe manner as shown in the drawings, whereupon fastening screws orsimilar devices 12 are passed through screw threaded openings formedtherein and into'binding engagement with adjacent portions of theperipheral surface of bed` block A4, hence, connecting the top or cover1() thereto and preventing movement of the same. In this way, it ismanifest that the bed block 4 and its cap or cover 10 will be secured inassembled relation.

The cap or cover 10 is formed with a substantially oval shaped opening13 of size and shape corresponding to the washer of the type of grommetto be` assembled and fastened thereupon, thus, permitting of theplacementof such a washer as indicated by the numeral 14 ,upon the bedblock 4in va position Vwhereat the opening therein will be properlypositioned with relation to the aforesaid oval opening 9 and likewise,that said washer 14will be so retained during the assembling, punchinand connecting' of the prongs of the body portion of the grommet orfastener over or with said washer 14.

In order that the dished `or inwardly curved exposed faces of thevarious' dogs 6 may properly perform their deflecting functions withengagement of the free ext-remities of the prongs of the body portion ofthe grommet therewith, pockets or recesses 15 are cut or otherwiseformed in the cap or cover 10 about the oval opening 13 and in a mannerto correspond to the arrangement of the pockets 5 and their respectivedogs 6 upon the bed block 4.V In this way, it is obvious that theinwardly curved or dished exposed surfaces of the said dogs 6 will be inposition to be properly engaged by the free extremities of the prongsupon the body portion of the grommet at all times, one of these bodyportions being shown in the accompanying drawings for convenience. anddesignated at Vthis time by the numeral. 16;

it being noted that such body portion is provided with angularlyextending marginal fastening prongs 17 adapted to pierce the fabricreceiving the device and to be then flexed or bent over the same and thewasher 14 for effecting a clamp-like assemblage of the device upon suchreceiving material- It is desirable that the dogs 6 withy their curvedlor dished exposed surfaces 8 shall be adjustably secured in positionwith respect to the bed block 4 and the cover 10 and to this end, Iengage in suitably screw threaded openings formed in the peripheralflange 11 of saidcap 10a plurality of adjusting screws 18, the innerextremities of the Shanks thereof being adapted to have bindingengagement with the adjacent outer ends of the corresponding dogs 6.Hence, because of the snug slidable engagement of these dogs in theirparticular pockets 5, it will be appreciated that the same may beadjusted vertically or angularly therein.` following which, theirparticular adjusting screws are engaged with the same and the dogs,accordingly, firmly secured lin their properly adjusted positions.

The upper die is of the s'o-called anvilv type, comprising a bodyportion 19, substantially oval rin configuration and corresponding,somewhat, to the general configuration o-f the body' portion 16 ofthegrommet to be assembled and fastened thereby. This body portion may beand preferside of said body portion and about the at` taching shank 3.

The attaching shank 3,. aforesaid, is

snugly but removably received through an opening formed concentricallyof the oval-y shapedbody portion 19 of the upperdie 2 and carries ahead-like oval portion 21 upon the lower end thereof, suchportiorrconstituting the punch or fabric cutting portion of the invention. 'Inthis connection, it will be noted that the punch 21 of a configurationcorresponding to that of the oval opening 9 and furthermore, that thesame is of a'sizev such'V as to permit of snug engagement and passagethrough such oval opening 9. Therefore, with downward,movement of theupper die 2 in the operating machine, the punch 21 will enter the ovalopening-'9 and in so doing, will pass through the material receiving thegrommet, thereby punch'- ing an oval shaped opening in the same,corresponding to Vthe oval opening formed in' tha-body portion V16andthe fastener .ring

oftheovalbody portion 19 of saidv upper die 2. 'I"hus, it will beappreciated thatwith engagement ofV the rib 22 in the openings formedinthe collar like extension 28, further movement as between Vthe punch21v and the,

oval bony portion 19 will be prevented;

therefore, that proper engagement of the punch 21 in the oval opening 9of the lower` die 1 will at all Vtimes be insured.

In operation of my improved invention andl assun'iing that the upper andlower diesV have been properly positioned upon a receiving or `operatingmachine, the body-portion of a grommet or similar fastener indicated forconvenience by the numeral 16., is

engaged with the under side of the oval shaped body portion 19 `of theupper die 2, it 'being borne in mind that this oval, body portion ismagnetized and by consequence.

retains such body portion 16 of the grommet in engagement therewith.When so engaged with the body portion19 o-f the upper die 2, thefastener element 16 will have the oval shaped punch 21 extended throughand downwardly beyond the oval opening formed therein, while theattaching prongs 17 of such element will be disposed downwardly .andlocated in direct alignment with the curved exposed faces of the variousdogs 6 arranged upon the lower die 1. Also, a washer 14 is laid upon thebed block 4: of the lower die 1, within the opening provided therefor inthe cap or cover 10, the positioning of this washer upon the bed block 4being in a manner to correspond to the positioning or placement of thebody portion 16 of the fastener upon the upper die 2. The materialreceiving the grommet or separable fastener, that is, the material uponwhich this particular fastener is to be secured, indicated at this timefor the purpose of convenience by the reference character M is nowarranged between the upper and lower dies 2 and 1. At this time, theupper die is moved sharply downwardly causing the punch 21 to be passedthro-ugh an adjacent portion of such material M during its engagement inthe oval opening 9 of the lower die 1. Simultaneously, the penetratingprongs 17 of the body portion 16 o-f the grommet or separable fastenerwill be passed through corresponding portions of said marial M while thefree extremities of the penetrating prongs 17 will be deflected inwardlyover the inwardly curved exposedl portions of the adjustably exposeddogs 6, thereby flexing or bending the extremities of said prongsvr 17over the washer 14 retained, during this time, in the oval-faced opening13 formed in the cap or-cover 10. Suiiicient force or pressure is ofcourse directed upon the Lipper' die-2 lto effect apositive clamping,-

assemblage as between the body portion` 16 and the washer 14 of thegrommet or separable fastening, and by consequence, the firm engagementof the inwardly bent extremities of the penetrating prongs 17 over theadjacent portions of said washer 14. In this way, it will be appreciatedthat the assembled'grommet will ber firmly secured-to thel receivingmaterial M and by conse-- q uence, its, disengagement' from. suchmaterial either through relative movement or similar objectionablefeatures will; be avoidedf. The upperdie 2 is nowfreturned or raised toits,V initial or* normalposition whereupon the material M is-rearrangedwith respect to the device, another body portion 16 engaged with theupper die 2 and a washer with the lower die 1 whereupon the device isready for further operation.

Manifestly, the construction shown is capable of considerablemodification, and such modification as is within the scope of my claims,I consider' within the spirit of my invention.

I claim:

1. A device of the character described, comprising opposed relativelymovable dies,

one thereof having a plurality of relatively surfacesv on its innerface, the opposite die consisting of an anvil portion cooperable withsaid deflecting surfaces of the first die, and a punching meansextending therefrom and engageable in a corresponding opening formed inthe first die.

2. A device of the character described, comprising opposed relativelymovable dies, one thereof having a plurality of relatively spaced andindependently radially adjustable deflecting means on its inner face,said die having an opening therein between sait deflecting means, theopposite die consisting of an anvil portion cooperable with saiddelecting meaA of the first die, and a punch.- ing means carried by andextending therespaced and radially adjustable deiiecting from slidablyengageable in said opening of the rst die.

3. A device of the character described, comprising opposed relativelymovable dies, one thereof having a plurality of relatively spacedradially disposed pockets formed therein, a plurality of dogs slidablyreceived in said pockets having inwardly curved upper faces, means ensaid die engageable with the dogs for securing the same in relativelyadjusted positions, said die having an opening*therethrough between thepockets therein, the opposite die consisting of an anvil p ortioncooperable with said dogs of therfirst die, and a punching` meanscarried by and extended therefrom engageable in said opening of the rstdie.

4. A device of the character described, comprising opposed relativelymovable dies,

one thereof having a plurality7 of dogs movably arranged in one of itsside-s, a cap engaged over said die, means caried on the cap forengagement with the said dogs, whereby to secure the same in relativelyadjusted positions, said cap having openings therein for exposing theupper faces of said dogs and an oval opening forming a washer receivingseat, said die having an opening extending therethrough and arrangedbetween said dogs, the opposite die consisting of an anvil portioncooperable with said dogs and with their ring receiving openings yinsaid cap, and a punch carried by and extending from said anvil portionsnugly engageable in the opening in said first die.V

5. A device of the character described comprising opposed relativelymovable dies, one of said dies consisting of a bed block having aplurality of relatively spaced radially disposed pockets formed thereinand opening onto the peripheral surface thereof,a plurality of dogssnugly and slidably engaged in said pockets and having their upper facescurved inwardly, the central portion of said bed block having an openingformed therein between said pockets, a cap having a peripheral flangesnugly engageable over the upper portion of said bed block, said caphaving a centrally arranged opening therein and other openings about thefor exposing the inwardly curved upper sides of said dogs, means forsecuring the cap to the bed block, other means on the cap for securingsaid dogs in relatively adjusted positions with respect to said bedblocl{,tl1e opposite die comprising an anvil portion of a configurationcorresponding Vto the openings formed centrally of said cap, said bodyportion being magnetized, a shank extending through an opening formed inthe anvil portion, a punch head carried upon the inner end portion ofsaid shank and extending from and beyond said anvil portion for snugengagement in the opening in said bed block, and means carried onthepunch engageable with portions of the anvil portion for preventingrelative rotary movement therebe-` tween.

In witness whereof I have hereunto set my hand.

ALOYS! J. HOFFMAN.

Saule

